Question

моторний човень ішов 2,2 год за течією річки і 1,4 год проти течії. Який шлях подолав човен за весь час руху , якщо швиткість течії дорівнює 2,3 км/год, а власна швідкість човна становить 18,9 км/год.

Answer 1

Ответ:

S=69,89

Пошаговое объяснения:

V човна за течією= V течії + V власна=2,3 +18,9= 21,2

V човна проти течіЇ= V власна - V течії=18,9 - 2,3=16,6

Весь шлях S=S1+S2

S1=V човна за течією * t за теч.=21,2 * 2,2=46,64

S2=V човна проти течіЇ * t проти теч.=16,6*1,4= 23,24

S= 46,64+23,24=69,89

Answer 2

Calculation of Distance Traveled by the Boat

To calculate the distance traveled by the boat, we need to consider the time it took to travel both with and against the current.

Let's denote the distance traveled with the current as D1 and the distance traveled against the current as D2. We are given that the boat traveled for 2.2 hours with the current and 1.4 hours against the current.

We are also given the speed of the current as 2.3 km/h and the speed of the boat as 18.9 km/h.

To calculate the distance traveled with the current, we can use the formula:

D1 = (speed of the boat + speed of the current) * time

Substituting the given values:

D1 = (18.9 km/h + 2.3 km/h) * 2.2 hours

Calculating the value:

D1 = 41.78 km

Similarly, to calculate the distance traveled against the current, we can use the formula:

D2 = (speed of the boat - speed of the current) * time

Substituting the given values:

D2 = (18.9 km/h - 2.3 km/h) * 1.4 hours

Calculating the value:

D2 = 23.24 km

Finally, to calculate the total distance traveled by the boat, we can add the distances traveled with and against the current:

Total distance = D1 + D2

Substituting the calculated values:

Total distance = 41.78 km + 23.24 km

Calculating the value:

Total distance = 65.02 km

Therefore, the boat traveled a total distance of 65.02 km during the entire time of its movement.